About MKISOFS
 

Everyone knows what it does, but how do you use it? Whenever I double-click it, it displays text scrolling too fast for me to read. Does someone have a GUI for it?

Run it in a DOS shell.
It should display its options.

look at the manpage:

http://www.dchlb.de/cdrecord/man_mkisofs.html

Thanks, that really helped. But, how do you connect it with CDRecord?

mkisofs creates the ISO-filesystem that cdrecord is able to burn.
so you have a DOS-prompt (or linux shell), do mkisofs, and after that you burn the resulting ISO with cdrecord.